Screening-machine.



T. M. DEVINE.

SCREENING MACHINE.

APPLICATION FILED JUNE 5, 1911.

1 5031, 127. Patented July 2,- 1912.

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UNITED STATES PATENT oFFIoE.

THOMAS M. DEVINE, OF CLEVELAND, OHIO, ASSIGNOR TO THE OHIO VARNISHCOMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

SCREENING-MACHINE.

To all whom it may concern:

Be it known that I, THOMAS M. Dnvmn, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented a certain new and useful Improvement in Screening-Machines, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings.

The object of this invention is to provide a simple and effectivemechanism for screening liquids; more particularly the mechanism isdesigned to remove the skins which form on paint whereby paint is put incondition for use.

To this end the invention comprises a vessel with intake and exit pipes,a suitable revolving drum-like screen which receives the imperfect paintthrough the entrance pipe and is adapted to retain the skins, allowingthe passage of strained fluid.

A more particular embodiment herein shown is also comprised within myinvention, wherefore the invention may be conveniently summarized asconsisting of the combinations of cooperating parts herein described andclaimed.

In the drawings, Figure 1 is a vertical longitudinal central sectionthrough my apparatus; Fig. 2 is a transverse central section thereof;Fig. 3 is a detail showing the construction at the junction of the headand body of the vessel; Fig.4 is a detail illus trating the band forclamping the screen cloth in place; Fig. 5 illustrates the means forsecuring together the ends of the screen cloth.

As shown in Figs. 1 and 2, the body of the vessel is of a somewhatrectangular shaped structure having, as shown, vertical walls 10 and 11,the top plate 12, the hopper-like bottom 13, and an end 14. In place ofthe other end of the tank body is a removable head 20. This head istightly secured .to the body by means of bolts 21 passing through thehead and flanges 16 on the body through an interposed gasket 25. This isshown more fully in Fig. 3. It will be seen that the head and body makea closed tank having only the entrance to the center of the head (to behereinafter described), and the exit at the bottom of the hopper. Thisexit consists of the pipe 18 which leads downwardly into the shut-ofi'cock 30 of a Specification of Letters Patent.

Application filed .Tune 5, 1911.

Patented July 2, 1912.

Serial No. 631,482.

usual construction. The top 12 of the tank is also preferably made as aseparate piece and secured to the flanges 17 of the walls by bolts 18.The entrance to the vessel is provided by a pipe 40, which is shown aspassing through the center of the-head 20 and is firmly fixed to thehead by reason of the head being bolted to a collar 41 rigid on thepipe. Outside of this collar the pipe is shown as having an elbow 42 andthen a section 43 connected by a union 44 with a main pipe having aflange or cock 45.

50, in Fig. 1, indicates a driving shaft provided with a pulley 51 andmounted in suitable bearings, one of which is indicated at 52. Thisshaft extends through a stufllng box 54 on the head 14 of the tank. Thisshaft within the tank drives the rotatable drum-like screen 60, whichwill now be described.

The drum has two disk-like heads, one of them designated 61 beingrigidly mounted on the inner end of the shaft 50, as by having a centralinternally threaded boss 62 screwed on the end of the shaft. The otherhead 64 is loose on the pipe 40, which forms a bearing for it.Connecting the two disks 64 and 61 seating in notches therein andsecured firmly thereto are longitudinal bars 65. Surrounding these barsis the screen cloth 66 which lies outside of the bars and overlaps thetwo disk heads 61 and 64 and is clamped in place by a series of straps68. These straps have outwardly turned ends 69, as shown in Fig. 4, andthese ends are bolted together by bolts 67. As shown in Fig. 5, theoverlapping edges of the screen cloth may be reinforced by metal strips70 through which pass bolts 71.

The construction described makes astrong and stiff screening drum. Thepaint enters this drum through the pipe 40 and passes out at the bottomand sides of the drum. The continuous rotation of the drum carries theskins away from the screen surface where they tend to stick, presentingan unimpeded mesh for the passage of the liquid paint.

To prevent the skins from unduly clogging the mesh of the screen cloth,I prefer to provide a suitable brush, stationary in action, and lying incontact with the inner surface of the screen cloth sothat, as the drumrevolves, the skins are continuously brushed off of the surface. Suchbrush is shown in Figs. 1 and 2 and designated 80. It consists ofsuitable bristles or wires carried by a bar 81. To enable the brush .tobe conveniently put in place and removed when desired I support thebrush by links 83 and 84 pivoted at their outer ends to the bar 81 andat their inner ends to an extension 46 of the pipe 40. As shown in Fig.2, this extension consists of two side portions of the pipe left bycutting it away at the top and bottom, the links being mounted on bolts47 and connecting the side portions 46. Each link 83 or 84 is shown asconsisting of two bars pivoted on opposite sides of the bar 81 andspaced at their lower ends by distance pieces 48 on the bolts 47. Whenthe parts are in place the brush occupies the position shown in Fig. 1,being. held by the links 83 and 84 and the head 61 against which the endof the bar 81 abuts. This bar is preferably provided with a roller 82which runs on the internal surface of the head 61. lVhen it is desiredto remove the brush or other parts, the union 44 is disconnected, thebolts 21 taken out and the head 20 and pipe 40 drawn outwardly as aunit. In this movement the left hand end of the brush bar 81 (Fig. 1)abuts the inner face of the head 64 and the continual withdrawal of thepipe 40 causes the bar 81 to descend so that it comes into the axis ofthe pipe 40 between the projecting portions 46 and is withdrawn withthat pipe. Then the simple unscrewing of the shaft 50 from the bosscollar 62 enables the drum to be drawn out. Then the taking out of thebolts 67 and the bolts 71 entirely frees the screen cloth from the drumskele ton. This enables the cloth to be replaced with a fresh cloth,when desired. In the assemblage of the parts, after the drum is securedto the shaft 50, the brush and pipe 40 are inserted while in substantialalinement with each other, the end of the brush bar abutting the end ofthe shaft 50 and traveling outwardly as the pipe is shoved in. Asuitable pin 49 carried by the pipe arms 46 prevents the brush droppingout of place during its installation.

In certain cases it will be found more convenient to remove the drumthrough the top of the casing, then through the end. In order toaccomplish this end, the collar 41 is disconnected from the end plate20, and the pipe 40 drawn endwise from the casing and drum. Thismovement causes the collapsing of the brush as before, so as to permitits withdrawal through the end plate 64. The removal of the top plate 12and the unscrewing of the shaft 50 will permit the easy removal of thedrum.

The bars 65 are preferably flat and thin, so that they do not undulydisplace the brush bristles as the drum revolves.

Having thus described my invention, what I claim is 1. The combination,with a screen drum having disks at its ends and one of said disks havinga relatively small central perforation, of an axial inlet pipeprojecting into said perforation, a brush carried by said inlet pipe andadapted to be pressed outwardly against the interior of said screen,said brush being adapted to be collapsed and withdrawn through saidperforation.

2. The combination, with a revoluble screen drum having disks at itsends and one of said disks having a relatively small centralperforation, of an axial inlet pipe projecting into said perforation andforming a support for the drum, a brush carried by said inlet pipe andadapted to be pressed outwardly against the interior of said screen,said brush being adapted to be collapsed and withdrawn through saidperforation, a casing surrounding said drum and having removableportions permitting removal of said drum, and means for rotating saiddrum.

3. The combination, with a screen drum having disks at its ends and on eof said disks having a relatively small central perforation, of an axialinlet pipe adapted to extend into said perforation and having aforwardly projecting extension, a pair of links pivoted to saidextension, a bar pivoted to the outer ends of said links and havingbristles carried by its outer edge and forming a brush, said bar andlinks being adapted to be folded into alinement with said pipe so as topass through said perforation, means for moving the said bar laterallyaway from said extension after its insertion within said drum so as tocause the bristles thereof to bear against said screen, and means forimparting a relative rotative movement to said drum and brush.

4. The combination, with a screen drum having disks at its ends, one ofsaid disks having a relatively small central perforation and the otherof said disks having a fiat inner surface, of an axial inlet pipeadapted to extend into said perforation and having a forwardlyprojecting extension, a pair of links pivoted to said extension, a barpivoted to the outer ends of said links and having bristles carried byits outer edge and form ing a brush, said bar and links being adapted tobe folded into alinement with said pipe so as to pass through saidperforation, and said bar having its outer end adapted to con tact withthe flat inner surface of said other disks, whereby upon the insertionof said pipe into said perforation said bar will be moved laterally awaytherefrom and will have the bristles carried thereby pressed against theinner surface of said screen, and means for imparting a relativerotative movement to said drum and brush.

5. In a mechanism of the character set out, the combination, with avessel, of a screen drum within the vessel, a revoluble shaft connectedwith said drum for rotating it, and a removable intake pipe extendinginto the drum, a brush within the drum carried by the intake pipe bymechanism adapted to hold the brush against the interior of the screenor allow it to substantially aline with the intake pipe for removal.

6. The combination, with a vessel, of a screen drum within the same, arevoluble shaft connected with one end of the screen drum for rotatingit, an intake pipe extending into the screen drum and passing revolublythrough the other end of the vessel, a brush within the screen drum, andlinks connecting the same with the intake pipe and adapted to allow thebrush to assume a position substantially in alinement with the intakepipe for removing it.

7. In a device of the character described, the combination of a vessel,a stufling box carried at one end thereof, a revoluble shaft extendingthrough such stufling box, a screen a drum Within the vessel having adisk-like head and connected with the revoluble shaft, an intake pipe inalinement with the shaft extending through the opposite wall of thevessel and into the interior of the drum, said drum having a headjournaled on such intake pipe, a brush within the screen drum carrying aroller adapted to engage the disk connected with the shaft, and foldingmechanism connecting the brush with the intake ipe. p In testimonywhereof, I hereunto afiix my signature in the presence of two witnesses.THOMAS M. DEVINE. WVitnesses:

BRENNAN B. W'nsr, HAROLD E. SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

